28751311932 has 36 divisors (see below), whose sum is σ = 78039276840. Its totient is φ = 8214660384.

The previous prime is 28751311873. The next prime is 28751311973. The reversal of 28751311932 is 23911315782.

It is a super-2 number, since 2×28751311932² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24447807 + ... + 24448982.

It is an arithmetic number, because the mean of its divisors is an integer number (2167757690).

Almost surely, 2^28751311932 is an apocalyptic number.

It is an amenable number.

28751311932 is an abundant number, since it is smaller than the sum of its proper divisors (49287964908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28751311932 is a wasteful number, since it uses less digits than its factorization.

28751311932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48896810 (or 48896801 counting only the distinct ones).

The product of its digits is 90720, while the sum is 42.

The spelling of 28751311932 in words is "twenty-eight billion, seven hundred fifty-one million, three hundred eleven thousand, nine hundred thirty-two".